I'm in the process of re-wring much of the informational content of this site in 3 ability-level versions, the first are here
http://www.coolantarctica.com/schools/antarctica_school.htm
Maybe you could take a look at:
What is it like in Antarctica? - 1
What is it like in Antarctica? - 2
There are 3 versions of the same page. In particular, any feedback you could give on the pages themselves and then the use of symbols to denote easy/mid/full pages would be useful.
Thanks - Paul